EP 0608049 A3 19950118 - Single-channel gas concentration measurement method and apparatus.
Title (en)
Single-channel gas concentration measurement method and apparatus.
Title (de)
Einkanal-Gaskonzentrationsmessverfahren und Vorrichtung.
Title (fr)
Méthode de mesurage à un canal de concentration de gaz et dispositif.
Publication
Application
Priority
FI 930127 A 19930113
Abstract (en)
[origin: EP0608049A2] The invention concerns a single-channel gas concentration measurement method and apparatus. According to the method, a radiant source (1) is employed to generate a measuring signal, the measuring signal is subsequently directed to a measurement object (3) containing a gas mixture to be measured, the measuring signal is subsequently bandpass filtered using at least two passband wavelengths, and the filtered measuring signals are detected by means of a detector (9). According to the invention, the bandpass filtering step is implemented by means of a single electrically tunable, short-resonator Fabry-Perot interferometer (7). <IMAGE>
IPC 1-7
IPC 8 full level
G01J 3/26 (2006.01); G01N 21/31 (2006.01); G01N 21/35 (2006.01); G02B 26/02 (2006.01); G01J 3/12 (2006.01)
CPC (source: EP US)
G01J 3/26 (2013.01 - EP US); G01N 21/31 (2013.01 - EP US); G01N 21/3504 (2013.01 - EP US); G02B 26/02 (2013.01 - EP US); G01J 2003/1247 (2013.01 - EP US)
Citation (search report)
- [A] DE 3925692 C1 19900823
- [A] DE 3812334 A1 19891026 - HARTMANN & BRAUN AG [DE]
- [X] DE 2525787 A1 19760401 - ALLIED CHEM
- [A] CH 569274 A5 19751114 - HEWLETT PACKARD GMBH
- [A] US 4899053 A 19900206 - LAI N C JOSEPH [US], et al
- [A] EP 0396319 A1 19901107 - WESTINGHOUSE ELECTRIC CORP [US]
- [PA] WO 9309422 A1 19930513 - VALTION TEKNILLINEN [FI]
Designated contracting state (EPC)
BE CH DE FR GB LI NL
DOCDB simple family (publication)
EP 0608049 A2 19940727; EP 0608049 A3 19950118; EP 0608049 B1 20011107; DE 69428928 D1 20011213; DE 69428928 T2 20020627; FI 930127 A0 19930113; FI 930127 A 19940714; FI 96450 B 19960315; FI 96450 C 19960625; JP 3457373 B2 20031014; JP H06241993 A 19940902; US 5646729 A 19970708
DOCDB simple family (application)
EP 94300082 A 19940106; DE 69428928 T 19940106; FI 930127 A 19930113; JP 212394 A 19940113; US 57375995 A 19951218